Decorative lamp



FIG. 1 is a plan view of the decorative lamp seen from its front showingmy new design;

FIG. 2 is a front side view thereof;

FIG. 3 is a bottom side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left-hand side view thereof; and,

FIG. 6 is a right-hand side view thereof.

The ornamental design for the decorative lamp, as shown.